Unanswered Question
Jul 8th, 2009

Hi I'm trying to troubleshoot a complaint that dtmf tones are not recognized at the ACD menu. The complaint alleges the callers are from 2 specific area codes. The calls come in on an analog trunk and are then sent to a route point to IPCC 4.0(5). Calls from other area codes work fine. Any suggestions for troubleshooting are appreciated.

I have this problem too.
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guy.richard Thu, 07/09/2009 - 00:31


Maybe apply "MTP requirement" on that gateway.

Hope that helps


geo_smith Thu, 07/09/2009 - 08:13

Isn't that only required for a 323 gateway? I'm using MGCP. The other thing that baffles me about this is the problem is only reported for callers from a couple of area codes. All other calls work as expected. I personally believe it is a problem on the callers side but I can not figure out how to prove that.

Thanks for your help!

guy.richard Thu, 07/09/2009 - 10:24

You are right about MTP, I'm so used to H323 gateways. Which type of voice interfaces do you use ? Is it possible to tune input gain (or attenuation) on voice-ports maybe dtmf level from this area (or carrier) is too low or to high and distorsed.

geo_smith Thu, 07/09/2009 - 11:19

That would be input gain on the port config in CCM? Currently at 0. How much would you recommend I change it? Anything I need to be aware of when making that change? dropped calls..etc?

Thanks for your suggestion!!


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